90021064 has 16 divisors (see below), whose sum is σ = 192902400. Its totient is φ = 38580432.

The previous prime is 90021049. The next prime is 90021067. The reversal of 90021064 is 46012009.

It is not an unprimeable number, because it can be changed into a prime (90021067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803704 + ... + 803815.

It is an arithmetic number, because the mean of its divisors is an integer number (12056400).

Almost surely, 2^90021064 is an apocalyptic number.

It is an amenable number.

90021064 is an abundant number, since it is smaller than the sum of its proper divisors (102881336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90021064 is a wasteful number, since it uses less digits than its factorization.

90021064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607532 (or 1607528 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 90021064 is about 9487.9430858327. The cubic root of 90021064 is about 448.1754335247.

The spelling of 90021064 in words is "ninety million, twenty-one thousand, sixty-four".